Horizons lacking both organic matter and clay illuviation are more likely to have ________ structure. Naim 07:22 Add Comment Horizons lacking both organic matter and clay illuviation are more likely to have ________ structure. Answer: platy
B horizons are more likely to have _______ structure. Naim 07:22 Add Comment B horizons are more likely to have _______ structure. Answer: prismatic
Compared to an uncultivated soil, as one cultivates a soil, the organic matter level: Naim 07:21 Add Comment Compared to an uncultivated soil, as one cultivates a soil, the organic matter level: Answer: decreases
A horizons are more likely to have _____ structure. Naim 07:21 Add Comment A horizons are more likely to have _____ structure. Answer: granular
The space between peds is most important for: Naim 07:21 Add Comment The space between peds is most important for: Answer: drainage of excess water
E horizons are more likely to have _______ structure. Naim 07:20 Add Comment E horizons are more likely to have _______ structure. Answer: platy
Horizons rich in illuviated clay are more likely to have _____________ structure. Naim 07:20 Add Comment Horizons rich in illuviated clay are more likely to have _____________ structure. Answer: blocky or prismatic
B horizons are more likely to have _______ structure. Naim 07:13 Add Comment B horizons are more likely to have _______ structure. Answer: blocky
A unit of non-structure in which there is no bonding between adjacent particles is called: Naim 07:13 Add Comment A unit of non-structure in which there is no bonding between adjacent particles is called: Answer: single grained
The space between peds is most important for: Naim 07:12 Add Comment The space between peds is most important for: Answer: root growth
Within a ped, granular structure is most important for: Naim 07:12 Add Comment Within a ped, granular structure is most important for: Answer: storage of water
Sandy soils tend to have bulk densities that are___________ than ideal sandy soil densities. Naim 07:12 Add Comment Sandy soils tend to have bulk densities that are___________ than ideal sandy soil densities. Answer: lower
Corn production is usually highest on: Naim 07:12 Add Comment Corn production is usually highest on: Answer: loams
Sandy soils generally benefit from some ___ Naim 07:11 Add Comment Sandy soils generally benefit from some ___ Answer: compaction
Clayey soils tend to have bulk densities that are______ than ideal clayey soil densities. Naim 07:11 Add Comment Clayey soils tend to have bulk densities that are______ than ideal clayey soil densities. Answer: higher
Potato production is usually highest on: Naim 07:11 Add Comment Potato production is usually highest on: Answer: sandy loams
Clayey soils generally benefit from some ______. Naim 07:11 Add Comment Clayey soils generally benefit from some ______. Answer: fluffing
A soil that forms a fair ribbon: Naim 07:10 Add Comment A soil that forms a fair ribbon: Answer: clay loam
A clay loam: Naim 07:10 Add Comment A clay loam: Answer: contains approximately 1/3 sand, 1/3 silt, and 1/3 clay by weight
A soil that forms no ribbon and also feels gritty Naim 07:10 Add Comment A soil that forms no ribbon and also feels gritty Answer: sandy loam
A soil that forms a fair ribbon and also feels smooth Naim 07:10 Add Comment A soil that forms a fair ribbon and also feels smooth Answer: silty clay loam
Which of the following textural classes is most likely to have soils with the slowest permeability? Naim 07:09 Add Comment Which of the following textural classes is most likely to have soils with the slowest permeability? Answer: clay loam
Which of the following textural classes is most likely to have soils with the most aeration? Naim 07:09 Add Comment Which of the following textural classes is most likely to have soils with the most aeration? Answer: sandy loam
Which of the following textural classes is most likely to have soils with the highest potential nutrient holding capacity? Naim 07:09 Add Comment Which of the following textural classes is most likely to have soils with the highest potential nutrient holding capacity? Answer: clay
Which of the following textural classes is most likely to have soils with the lowest water holding capacity? Naim 07:09 Add Comment Which of the following textural classes is most likely to have soils with the lowest water holding capacity? Answer: sand
As the silt settles out in a Bouyoucos hydrometer texture determination, the hydrometer will ______ Naim 07:08 Add Comment As the silt settles out in a Bouyoucos hydrometer texture determination, the hydrometer will ______ Answer: sink
Which of the following textural classes is most likely to have soils with the slowest permeability? Naim 07:08 Add Comment Which of the following textural classes is most likely to have soils with the slowest permeability? Answer: silty clam loam
Which of the following textural classes is most likely to have soils with the highest available water holding capacity? Naim 07:08 Add Comment Which of the following textural classes is most likely to have soils with the highest available water holding capacity? Answer: silty clay loam
Which of the following textural classes is most likely to have soils with the highest total water holding capacity? Naim 07:08 Add Comment Which of the following textural classes is most likely to have soils with the highest total water holding capacity? Answer: clay
Which of the following textural classes is most likely to have soils with the best aeration? Naim 07:07 Add Comment Which of the following textural classes is most likely to have soils with the best aeration? Answer: sand
Which of the following textural classes is most likely to have soils with the best balance of soil properties? Naim 07:07 Add Comment Which of the following textural classes is most likely to have soils with the best balance of soil properties? Answer: loam
Which of the following textural classes is most likely to have soils with the highest total water holding capacity? Naim 07:07 Add Comment Which of the following textural classes is most likely to have soils with the highest total water holding capacity? Answer: clay loam
Which of the following textural classes is most likely to have soils with the slowest permeability? Naim 07:07 Add Comment Which of the following textural classes is most likely to have soils with the slowest permeability? Answer: clay
Which of the following textural classes is most likely to have soils with the poorest aeration? Naim 07:06 Add Comment Which of the following textural classes is most likely to have soils with the poorest aeration? Answer: silty clay loam
When using Stokes' Law in a textural analysis, we assume all particles are spheres. This is a poor assumption for _____ sized particles. Naim 07:06 Add Comment When using Stokes' Law in a textural analysis, we assume all particles are spheres. This is a poor assumption for _____ sized particles. Answer: clay
When using Stokes' Law in a textural analysis, we assume all particles are ___. Naim 07:06 Add Comment When using Stokes' Law in a textural analysis, we assume all particles are ___. Answer: spheres
When using a Bouyoucos Hydrometer, the 40 second reading tells us the amount of __________ still in solution. Naim 07:06 Add Comment When using a Bouyoucos Hydrometer, the 40 second reading tells us the amount of __________ still in solution. Answer: silt and clay
When using Stokes' Law, we assume the particle density is __________ g/cm. Naim 07:05 Add Comment When using Stokes' Law, we assume the particle density is __________ g/cm. Answer: 2.65
When using a Bouyoucos Hydrometer, all of the silt has dropped below the zone of measurement by __________ Naim 07:05 Add Comment When using a Bouyoucos Hydrometer, all of the silt has dropped below the zone of measurement by __________ Answer: 2 hours
When using Stokes' Law to determine soil texture, all of the following are assumed to be constant except: Naim 07:05 Add Comment When using Stokes' Law to determine soil texture, all of the following are assumed to be constant except: Answer: radius of the particles
When using a Bouyoucos Hydrometer, the 2 hour reading tells us the amount of __________ still in solution. Naim 07:04 Add Comment When using a Bouyoucos Hydrometer, the 2 hour reading tells us the amount of __________ still in solution. Answer: clay
When using a Bouyoucos Hydrometer, all of the sand has dropped below the zone of measurement after __________. Naim 07:04 Add Comment When using a Bouyoucos Hydrometer, all of the sand has dropped below the zone of measurement after __________. Answer: 40 seconds
Once the volume of coarse fragments reaches ___%, the soil is unusable for cultivated crops. Naim 07:04 Add Comment Once the volume of coarse fragments reaches ___%, the soil is unusable for cultivated crops. Answer: 60
The middle sized soil particle in textural class analysis is: Naim 07:04 Add Comment The middle sized soil particle in textural class analysis is: Answer: silt
When we determine soil texture we ignore: Naim 07:04 Add Comment When we determine soil texture we ignore: Answer: coarse fragments and organic matter
The largest soil particle in a textural class analysis is: Naim 07:03 Add Comment The largest soil particle in a textural class analysis is: Answer: sand
The arrangement of soil particles in space: Naim 07:03 Add Comment The arrangement of soil particles in space: Answer: soil structure
Coarse fragments are ignored in the textural class name if they occupy less than ____________ of soil volume. Naim 07:03 Add Comment Coarse fragments are ignored in the textural class name if they occupy less than ____________ of soil volume. Answer: 15%
The percent distribution of sand, silt, and clay in the soil: Naim 07:02 Add Comment The percent distribution of sand, silt, and clay in the soil: Answer: soil texture
The smallest soil particle in a textural class analysis is: Naim 07:02 Add Comment The smallest soil particle in a textural class analysis is: Answer: clay
Which of the following has the lowest bulk density? Naim 07:02 Add Comment Which of the following has the lowest bulk density? Answer: organic matter
If coarse fragments occupy between ___ and ___ percent of the soil volume they interfere with tillage and reduce yield but do not prevent the use of the soil for cultivated crops. Naim 07:02 Add Comment If coarse fragments occupy between ___ and ___ percent of the soil volume they interfere with tillage and reduce yield but do not prevent the use of the soil for cultivated crops. Answer: 15-60